Just wanted to report a quick bug regarding Minecraft IGNs:

It seems that after a user has migrated to Microsoft, and if they change their name, the old name while dropping/on cooldown still resolves to the same UUID.

An example of this is the user "Caves_and_Cliffs", formerly known as "Whomsky". The name history endpoint shows that their current IGN is "Caves_and_Cliffs" and they recently changed from "Whomsky" after they migrated (you can tell they've migrated since the name history endpoint shows milliseconds in the epoch time for Microsoft accounts and only seconds in the epoch time for Mojang accounts): https://api.mojang.com/user/profiles/787e987740234b4eb9a1b93831d19378/names

The sessionserver says the same: https://sessionserver.mojang.com/session/minecraft/profile/787e987740234b4eb9a1b93831d19378

However, trying to resolve the user "Whomsky" gives the same UUID: https://api.mojang.com/users/profiles/minecraft/Whomsky

The same goes for the account "3greatdoggies", whose dropping username "3greatdoggies2" resolves to the same UUID.

The intended behavior is that the old username gives a 204 No Content status code on the /users/profiles/minecraft/ API endpoint while it is on cooldown/dropping.